glibc being at the core of the system it can't be changed without major risk to the whole system. If you can't make the software work with an older version of glibc (or use an older version of the software that is compatible with the glibc version you have) then the solution is indeed to use a container. Check the public container registries (e.g. dockerhub, biocontainers) to see if a container is already available. Otherwise, you can build it yourself by installing the software in a container based on a recent version of Ubuntu.